Why do you THINK the Earth's inner core is solid, despite being about 5000 degrees celsius, far above the melting points of metals.

Explanation:

Because inner the core is really a hot and contains mostly made of metals like irons

pure substance: iron,copper

impure substance: water,charcoal

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .